Stiller Predator v. TAC 300 action for scope mounts

[Derek M.]

I have two rifles with Predator actions and two with TAC300 actions. I have Talley 30mm integral one piece scope mounts on the Predator actions and want the same style but one inch for the two TAC 300 actions. Are the same Talleys used for both actions? I thought the screw diameters might be different.